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Evgesh-ka [11]
3 years ago
15

Number of centromeres visible at prophase are?

Biology
1 answer:
mote1985 [20]3 years ago
8 0

Answer:

46 centromeres

Explanation:

In a human cell, in late prophase, there would be 46 centromeres visible if the magnification is high enough. Each of the 46 pairs of sister chromatids is held together by a centromere.

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Why does the liver have a hepatic portal vein and a hepatic vein?
gregori [183]

Answer:

The liver have a hepatic portal vein and a hepatic vein for blood flow and transport of nutrients.

Explanation:

Hepatic portal vein is also known as portal vein that carries blood from the organs (gastrointestinal tract, pancreas and gallbladder) to the liver. The nutrients are also transfer by the hepatic portal vein.

Hepatic vein: This vein carry deoxygenated blood into the inferior vena cava from the liver. Total three hepatic veins brings deoxygenated blood from right, left and middle part of liver.

5 0
3 years ago
Use the punnett squares below to model each parent combination after filling in each Punnett square predict then percentages of
Oduvanchick [21]

The provided question is incomplete as it lacks the combinations of parent as metion in the question, however the complete question is attached as the image.

Answer:

There are two parent combinations that are :

1. heterozygous black Ff cross with heterozygous black Ff

2. heterozygous black Ff cross with white ff

Explanation:

1. in first combination the each parent will produce F and f gametes, as it is shown as Capital F so it will be dominant over f as per the rule. so the cross can be shown as :

    F      f

F  FF    Ff

f  Ff     ff

where, FF are black Ff black and ff white offspring. As there is clearly 3 black offspring over one white spring so the ratio is 3:1 or 75% chances of black and 25% chances of white offspring (phenotype).

2. in second combination there would be F and f gametes for black parent and f and f for white parent, thus the offsprig would be :

    F     f

f   Ff    ff

f   Ff    ff

As, there is two black and two white springs are produced than the ratio would be 2:2 or 50% chances of each white offspring and black offspring (phenotype)

4 0
3 years ago
Question 7 0410
aev [14]

Answer:

Nuclear fusion

Explanation:

Nuclear fusion is a process whereby the nuclei of two smaller atoms combine to form a much larger atom, accompanied with the release of energy. This is opposed to nuclear fission where a larger atom splits into simpler and smaller atoms.

According to this question, the process of releasing energy when two stoms combine to form a larger atom is called NUCLEAR FUSION. A very common example of nuclear fusion is the combination of hydrogen atoms in the sun to produce Helium atom, with the release of heat energy.

3 0
3 years ago
When invaded by antigens, the body forms substances called?
Delvig [45]
Anti-bodies. This is not a hard question to answer, as you can just copy/paste the question into a search engine to get an adequate answer.
7 0
3 years ago
What was known before Franklin and Wilkins conducted their studies of DNA? Select three options.
Mashcka [7]

Answer:

The study of DNA started much before the discoveries of Rosalind Franklin and Maurice Wilkins. Nucleus of cell was discovered by Robert Brown in 1831 but the material present inside the nucleus called "nuclein" (DNA) came from the studies of Johann Friedrich Miescher in 1869.

Explanation:

8 0
2 years ago
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